<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise模拟远程用户登录</title>
</head>
<body>
    <script>
        //1 模拟数据源
        const users = [{ username: 'user1', password: 'password1' }, { username: 'user2', password: 'password2' }]; 
        //2 模拟登录验证
        function auth(username,password){
          return new Promise((resolve, reject)=>{
            setTimeout(()=>{
                const user = users.find(user=>user.username===username&&user.password===password);
                if(user){
                  resolve(user);
                }else{
                  reject('用户名或密码有误');
                }
            },2000);
          });
        };

        auth('user1', 'password1').then((user)=>{
            console.log(`Welcome, ${user.username}!`);
        },(error)=>{
            console.error(error.message);
        });
    </script>
</body>
</html>